Gottfried axdorfer



(No Model.)

G. AXDORFER.

GAS FURNACE? Patented May 29 l za'ezazar:

m: mmcml. umnaumuu COMPANY,

WASHINHYON. n. 1:.

UNITED STATES PATENT FFICE.

GOTTFRIED AXDORFER, OF HAMBURG, GERMANY, ASSIGNOR OF ONE-HALF TOCHRISTIAN HEINRICH FRIEDRICH SASS, OF SAME PLACE.

GAS-FURNACE.

SPECIFICATION forming part of Letters Patent No. 520,404, dated May 29,1894.

Application filed December 8, 1893. Serial No. 293,078. (No model.)

To to whom it may concern.-

' Be it known that I, GOTTFRIED AXDORFER, a subject of the Emperor ofAustria-Hungary, residing at Hamburg, in the German Empire, haveinvented certain new and useful Improvements in Gas-Furnaces, of whichthe following is a specification.

My invention relates to improvements in gas-furnaces and moreparticularly to the apparatus for mixing gas and air in gas-furnaces.

. The object of my invention is however to afiord a more rapid andintimate mixing of such gas and air than with the devices heretoforeemployed. By reason of the uniform mixing of gas and air not only theoccurrence of pointed (blow-pipe) flames is completely obviated but alsoa smokeless combustion insured. I attain the said object by themechanism illustrated in the accompanyingdrawings, in which- Figure 1,is a sectional side elevation of my improved gas and air mixingapparatus; Fig. 2, a horizontal section of the same, and Fig. 3, a crosssection on the line I-II, Fig. 1.

Similarletters refer to similar parts throughout the several views.

' The improved apparatus comprises a mixing chamber 61 arranged betweenthe combustion or igniting chamber a and the gas and air supply formingnozzles 12 and c respectively. The lateral walls e and f of the mixingchamber are provided with slots 6 and f respectively, which correspondto the orifices of the said gas and air inlet nozzles, which have alsothe form of slots. I arrange in the mixing chamber (1 a grate slide gadapted to be adjusted by means of screws 3 and having bars 9' whichcover the slots in the aforesaid walls 6 and f, more or less accordingto the adj ustment, in order tolregulate the quantity of gas and airwhich passes out for combustion. As the gas and air on leaving thenozzles impinge against the bars 9' of the slide and against theopposite wall f of the mixing chamber at strong whirling movements areproduced in the'latter so that the gas and air serving for thecombustion will become intimately mixed. The mixture then passes throughthe slots f in.the wall f of the mixing chamber into the combustionchamber a, which for instance in the case of steam boilers may form thefront part of the furnace, the heating flame spreading from thecombustion chamber freely in the furnace. The mixture of gas and air maybe ignited in any suitable manner.

Owing to the uniform mixing of the gas and air and to the adjustment ofthe slide covering a portion of the slots I. obtain a very extensive anduniform spreading of the flame produced, thereby obviating the injuriouspointed or blow pipe flames and effecting a complete utilization of thefuel, so that smoke will be entirely absent from the products ofcombustion which finally escape and a considerable saving of fuel willbe realized. The preliminary heating of the air used for the combustionmay be effected according to circumstances.

Having fully described my invention, what I claim, and desire to secureby Letters Patent, is

1. In combination, a combustion chamber,

a mixing chamber provided with outlet ports in its wall proximate to thecombustion chamber and with separate gas and air inlet ports in itsopposite wall, said inlet ports arranged diametrically opposite theoutlet ports, and intercepters as bars, interposed between therespective ports, for the purpose set forth.

2. In combination, a combustion chamber, a mixing chamber provided withoutlet ports in its wall proximate to the combustion chamber and withseparate gas and air inlet ports in its opposite wall, said inlet portsarranged diametrically opposite said outlet ports, and intercepters, asbars interposed between and of less width than that of said inlet andoutlet ports, for the purpose set forth.

3. In combination, a combustion chamber, a mixing chamber provided withoutlet ports in its wall proximate to the combustion chamber and withseparate gas and air inlet ports in its opposite wall, said inlet portsarranged diametrically opposite said outlet ports, and interceptor barsinterposed between and adjustable relatively to said inlet and outletports, for the purpose set forth.

4. In combination, a combustion chamber, a mixing chamber provided withoutlet ports in its wall proximate to said combustion chamber and withseparate gas and air inlet ports in its opposite wall, said inlet portsarranged diametrically opposite said outlet ports, an intercepterconsisting of a grate havingbars of less Width than that of the inletand outlet ports, interposed between said ports, for

5 the purpose set forth.

5. In combination, a combustion chamber, a mixing chamber provided withoutlet ports in its wall proximate to said combustion chamber and withseparate gas and air inlet ports 10 in its opposite Wall said inletports arranged diametrically opposite said outlet ports, an intercepterconsisting of an adjustable grate having bars of less width than that ofthe inlet and outlet ports, interposed between said 15 ports, for thepurpose set forth.

6. In combination, a combustion chamber, a narrow mixing chamberprovided with outmy invention I have signed my name, in pres-,

ence of two Witnesses, this 24th day of November, 1893.

GOTTFRIED AXDORFER. Witnesses:

ALEXANDER SPECI-IT, HARRY F. W. GRETHE.

